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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id 6-20020a170902c20600b001ac84f5559csm8370111pll.126.2023.06.15.01.43.14 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Thu, 15 Jun 2023 01:43:16 -0700 (PDT) Date: Thu, 15 Jun 2023 16:43:11 +0800 From: Nylon Chen To: Conor Dooley Cc: schwab@suse.de, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, jszhang@kernel.org, ajones@ventanamicro.com, aou@eecs.berkeley.edu, palmer@dabbelt.com, paul.walmsley@sifive.com, greentime.hu@sifive.com, zong.li@sifive.com, nylon7717@gmail.com Subject: Re: [PATCH v2] RISC-V: Support 32_PCREL relocation type in kernel module Message-ID: <20230615084310.GA780@hsinchu15> References: <20230615072302.25638-1-nylon.chen@sifive.com> <20230615-unvisited-deceit-9beab8ce987a@wendy> <20230615-luxurious-rewire-84ff9d639fea@wendy> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20230615-luxurious-rewire-84ff9d639fea@wendy> User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 15, 2023 at 09:11:33AM +0100, Conor Dooley wrote: Hi Conor, > Hey Nylon, > > Firstly, no html emails please :/ Sorry, my Gmail settings got messed up. I will be more careful in the future. > > On Thu, Jun 15, 2023 at 03:52:27PM +0800, Nylon Chen wrote: > > Conor Dooley > 於 2023年6月15日 週四 下午3:38寫道： > > > On Thu, Jun 15, 2023 at 03:23:02PM +0800, Nylon Chen wrote: > > > > Fix the 'unsupported relocation type' error caused by > > > > enabling the -fasynchronous-unwind-tables flag, > > > > which generates relocation types that are not supported. > > > > > > What commit adds the -fasynchronous-unwind-tables flag? > > sorry my description is not correct, please allow me to add > > > > I mean, when we use the flag "-fasynchronous-unwind-tables," it generates > > the relocation type R_RISCV_32_PCCREL. However, this type is currently not > > supported, so an error will occur. > > (snip) > > > > Should there be a Fixes: tag for that commit? > > > yes, I will do it. > > What mainline commit actually enables this flag? Because LLVM currently has it enabled by default(https://reviews.llvm.org/D145164), it will generate this relocation type. >From what I know, GCC will also enable it in the future. > > Cheers, > Conor.